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authorCraig Hesling <hesling@chromium.org>2019-11-27 11:50:47 -0800
committerShelley Chen <shchen@google.com>2019-12-05 21:27:42 +0000
commitfcd8c9e99e7f70e2b9494f2fa28a08ba13126daa (patch)
treea790a0ea2baceebe2bf83015cbd39d5112e9e781 /src/mainboard/pcengines/apu1
parent344b331783a3c315ed6d34cbe980cd08c12e3574 (diff)
hatch: Fix FPMCU pwr/rst gpio handling
1. No gpio control in bootblock 2. Disable power and assert reset in ramstage gpio 3. Power on and then deassert reset at the end of ramstage gpio 4. Disable power and assert reset when entering S5 On "reboot", the amount of time the power is disabled for is equivalent to the amount of time between triggering #4 and wrapping around to #3, which is about 400ms on Kohaku. Since #2 forces power off for FPMCU, S3 resume will still not work properly. Additionally, we must ensure that GPP_A12 is reconfigured as an output before going to any sleep state, since user space could have configured it to use its native3 function. See https://review.coreboot.org/c/coreboot/+/32111 for more detail. The control signals have been validated on a Kohaku in the following scenarios: 1. Cold startup 2. Issuing a "reboot" command 3. Issuing a "halt -p" and powering back on within 10 seconds 4. Issuing a "halt -p" and powering back on after 10 seconds 5. Entering and leaving S3 (does not work properly) 6. Entering and leaving S0iX BRANCH=hatch BUG=b/142751685 TEST=Verify all signals as mentioned above TEST=reboot flash_fp_mcu /opt/google/biod/fw/dartmonkey_v2.0.2417-af88cc91a.bin TEST=halt -p # power back on within 10 seconds flash_fp_mcu /opt/google/biod/fw/dartmonkey_v2.0.2417-af88cc91a.bin TEST=halt -p # power back on after 10 seconds flash_fp_mcu /opt/google/biod/fw/dartmonkey_v2.0.2417-af88cc91a.bin Change-Id: I2e3ff42715611d519677a4256bdd172ec98687f9 Signed-off-by: Craig Hesling <hesling@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/37459 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Furquan Shaikh <furquan@google.com>
Diffstat (limited to 'src/mainboard/pcengines/apu1')
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